Changing the electrical connections to reverse the direction of rotation of a motor running at full speed is called ________.

Option 1: cogging

Option 2: slugging

Option 3: plugging

Option 4: dynamic braking

Correct Option: 3

Explanation

Plugging is the process of reversing the direction of rotation of a motor running at full speed by reversing the supply phase sequence. This produces a torque in the reverse direction and the motor tries to rotate in the opposite direction. The correct answer is option 2.

Changing the electrical connections to reverse the direction of rotation of a motor running at full speed is called ________.

Explanation

In 1-ϕ IM if the slip of motor is S with regard to the forward rotating flux, then its slip with regard to the backward rotating flux will be:

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